/*
 * Copyright (C) 2015-2018 EPAM Systems
 *
 * This file is part of Indigo ELN.
 *
 * Indigo ELN is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Indigo ELN is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Indigo ELN.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

function fileUploader() {
    var files;

    return {
        getFiles: getFiles,
        setFiles: setFiles,
        addFile: addFile,
        removeFile: removeFile,
        addFiles: addFiles
    };

    function getFiles() {
        return files;
    }

    function setFiles(newFiles) {
        files = newFiles;
    }

    function addFile(newFile) {
        if (files) {
            files.push(newFile);
        }
    }

    function removeFile(file) {
        if (files) {
            files = _.without(files, file);
        }
    }

    function addFiles(newFiles) {
        if (files) {
            files = _.union(files, newFiles);
        }
    }
}

module.exports = fileUploader;
